In a post WW4 word many things had to change for society to rebuid. Thanks to the advanced science of Thrice Inc, Japan has been rebuilt into 26 livable sectors. The 27th? Oh the dead sector? That's where they say they live. Mazoku: Those born with the omega cell, murdering, mutated power wielding monsters threaten the peaceful society that STAM fights daily to protect humans. But that's only what NewsNet will tell you. Those murdering mazoku may  be closer than STAM had first thought.